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DISCUSSION FORUMS : Forkliftaction.communicate
Forum: Safety, training & legislation
Discussion:  FLT stability triangle
Number of messages: 4

START MESSAGE:
gl_l
israel, Israel
Hi everyone,
I could not understand why we treat '4 wheels FLT base' as triangle instead of rectangular for stability considerations. What is the difference between '4 wheels FLT' and other vehicles?
Is there any good artical explain that issue?
Thanks

Posted 10 Nov 2009 10:53 PM Reply  Report this message
REPLIES: Sort replies by
TradeShowDave
California, United States

Basically....
The reason a forklift has three points of stability instead of four is: the steering axle on a forklift is connected in the center only, to the rest of the forklift.  
This is so that the lift truck can drive over a small dip, or driveway and still have all four wheels on the ground.
This also makes turning on a ramp or hill very dangerous because the center of gravity needs only move a few inches to be outside of the “stability triangle” to cause the forklift to turn over.
An unloaded truck is less stable than a partially loaded truck in relation to the location of the center of gravity and the increased possibility of side tipping.

Posted 11 Nov 2009 01:34 AM Reply  Report this message
dan_m
Ontario, Canada
Trade Show Dave is absolutely correct, but here is a less technical answer:

Another way one can look at it, is this:

There are 3 support points, or suspension points, that support the forklift onto the frame of the truck before the truck hits the ground.  One is located at each hub of the front drive wheels, and the third, at the pivot box in the center of the rear axle.  The 2 rear steer wheels are not connected to the frame of the truck with shocks, struts, etc, There is not a direct connection of the rear wheels onto the frame.  But the pivot box is mounted onto the frame, hence the third support point.

Play connect the dots amongst the three support points, voila, you've got yourself a triangle, known as the stability triangle.

Posted 11 Nov 2009 02:46 PM Reply  Report this message
gl_l
israel, Israel
Thank you all,
If so, what are the addvantages in triangle configuration that still manufacturing such FLT's?

Posted 11 Nov 2009 04:40 PM Reply  Report this message


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